CN218407905U

CN218407905U - Fan impeller and fan

Info

Publication number: CN218407905U
Application number: CN202222917154.XU
Authority: CN
Inventors: 康磊; 娄建军; 强亮亮; 郭旭桐; 许卫良
Original assignee: Jiangsu Luhang Power Technology Co ltd
Current assignee: Jiangsu Luhang Power Technology Co ltd
Priority date: 2022-11-01
Filing date: 2022-11-01
Publication date: 2023-01-31
Anticipated expiration: 2032-11-01

Abstract

The utility model discloses a fan wheel and fan, fan wheel include the impeller base member and set up the blade on the impeller base member at least one flow groove is seted up to the pressure surface of blade, the flow groove is followed the outer end of blade is inwards extended. The fan comprises a fan volute, a cleaning ring and a front guide blade, the fan impeller is connected with the fan volute, the cleaning ring is arranged at the front end of the front guide blade, a cleaning pipe is arranged on the cleaning ring, and a cleaning spray head is arranged on the cleaning pipe. The utility model discloses set up one at least runner groove according to the streamline at the pressure surface of blade, the flow through self gas will deposit in the solid dirt or the oil mist capture runner groove on blade surface, get rid of the harmful substance of gathering through the centrifugal force of impeller self to the purpose of automatically cleaning is reached, reduces the corruption and the balanced influence of acid mud and tar to the impeller.

Description

Fan impeller and fan

Technical Field

The utility model belongs to a sulphuric acid fan, coke oven gas fan, concretely relates to impeller of fan.

Background

The large industrial fan plays a fundamental role in economic and civil life, the large industrial fan is usually not allowed to stop outside a planned maintenance period, but for an SO2 fan or an anxiety gas fan, the gas per se has certain corrosivity, the gas for the SO2 fan contains acid dust, acid sludge is generated and attached to a through-flow part over time, for a coke gas booster fan, sticky tar is accompanied with tasting in the gas, and the acid sludge and the tar have many adverse effects on the stable operation of the fan, SO that the fan is required to have a certain self-cleaning function in a working state, and the fan is allowed to be cleaned on line during working.

The surface roughness of the blade is increased due to dust deposition or scaling of the blade of any ventilator or compressor, the streamline of the blade is changed, the mass distribution of a rotating part deviates, the gas resistance is increased, the pressure head is insufficient, the efficiency of the fan is reduced, the self cooling effect is poor, and even abnormal sound vibration is generated in a unit; local corrosion or scaling causes the pressure resistance of the pipeline to be poor, and even the leakage of the system occurs.

Disclosure of Invention

The utility model aims to solve the technical problem that a fan wheel and centrifugal fan with self-cleaning function are proposed.

In order to solve the technical problem, the utility model adopts the technical scheme that:

the utility model provides a fan wheel, includes the impeller base member and sets up blade on the impeller base member, its characterized in that: the pressure surface of the blade is provided with at least one flow line groove, and the flow line groove extends inwards from the outer end of the blade.

The number of the flow line grooves arranged on the pressure surface of the blade is 3-5.

The number of the flow line grooves arranged on the pressure surface of the blade is 4.

The section of the flow line groove is arc-shaped, U-shaped or zigzag.

A fan, adopt the utility model provides a fan impeller.

The fan comprises a fan volute, a cleaning ring and a front guide blade, the fan impeller is connected with the fan volute, and a sewage discharge port is formed in the fan volute; the front guide vane is arranged at the front end of the fan impeller; the cleaning ring is arranged at the front end of the front guide blade, a cleaning pipe is arranged on the cleaning ring, and a cleaning spray head is arranged on the cleaning pipe.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses set up one at least runner groove according to the streamline at the pressure surface of blade, the flow through self gas will deposit in the solid dirt or the oil mist capture runner groove on blade surface, get rid of the harmful substance of gathering through the centrifugal force of impeller self to the purpose of automatically cleaning is reached, reduces the corruption and the balanced influence of acid mud and tar to the impeller. In the same way, most of tar of the coke oven gas fan is not deposited on the rotor under the action of centrifugal force, so that the balance of the rotor is not damaged.

2. The online cleaning function is matched, the waste acid is discharged periodically, and the pollution of acidic substances to the SO2 fan, the system pipeline and other equipment is reduced.

3. The cleaning by matching with ammonia water, the regular discharge of tar, naphthalene and the like can reduce the blockage of a gas blower and subsequent equipment, and is beneficial to the recovery of chemicals and the purification of gas.

4. The down time and the overhaul frequency of the equipment are reduced, the maintenance cost is reduced, and the user income is increased.

Drawings

Fig. 1 is a schematic structural view of a fan impeller of the present invention;

fig. 2 is a schematic structural diagram of the fan of the present invention.

FIG. 3 is a schematic view of the cleaning ring.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings:

the embodiment provides a fan impeller which is structurally shown in fig. 1. The impeller comprises an impeller base body 41 and blades 42 arranged on the impeller base body 41, wherein the pressure surface of each blade 42 is provided with at least one flow line groove 43; a runner duct 43 extends inwardly from the outer end of the blade.

The number of the flow line grooves arranged on the pressure surface of the blade is 3-5. The number of the streamline grooves 43 provided in each blade 42 may be the same or different.

The streamline grooves 43 of each blade 42 may be identical in shape or different in shape. The cross section of the flow line groove is in the shape of circular arc, U-shaped or zigzag, and the number of the grooves and the size of the grooves are determined according to the viscosity of the fluid or the particle size of the magazine particles and the quantity of harmful substances to be removed.

In the embodiment shown in fig. 1, the number of flow channels 43 provided on the pressure side of the blade 42 is 4.

The multi-channel flow line grooves 43 are arranged on the pressure surface of the impeller 32 according to flow lines, the speed of harmful impurities is slightly lower than that of main flow gas under the drive of the gas, the harmful impurities are regularly distributed on the impeller under the rotation action of the impeller, the harmful impurities are mainly concentrated on the pressure surface of the impeller, the large particle size is about close to the blade top, and the harmful impurities are collected into the grooves and then are thrown out outwards along the grooves under the action of centrifugal force.

Because the viscosity of tar is high and a diluent cannot be added before a fan, the surface of the impeller is usually protected by a coating, and the tar deposited on the surface of the impeller is thrown out along a streamline groove at a certain temperature and finally deposited at the bottom of the volute;

often have dust and vapor etc. in the flue gas that contains SO2, form acid mud in the course of the work, the great solid particle of particle diameter is extremely serious to the washing away of pipeline, stator, impeller, if can not in time discharge, can hinder pneumatic flow at the metal surface scale deposit, produces the influence to the balance of impeller, and the impeller of this application can be thrown away most granule and prevent to bond on the impeller surface.

The embodiment provides a centrifugal fan, and referring to fig. 2, an online cleaning section is added at the front end of the air inlet of a general fan. The centrifugal fan mainly comprises a cleaning pipe 1, a cleaning ring 2, a front guide vane 3, a centrifugal impeller 3, a fan volute 5 and a sewage outlet 6.

The cleaning ring 2 has an inlet pipe 21, an annular pipe 22 and a plurality of outlets. The cleaning pipe 1 is connected to the liquid inlet pipe 21, and the cleaning nozzle 23 is connected to the liquid outlet of the annular pipe 22.

The cleaning section can be used for realizing online cleaning. On-line cleaning cooperation fan clears away inside impurity under the circumstances of not shutting down, and clean pipe 1 is external to clean pump truck, gets into the annular chamber in the cleaning ring 2 behind the outside pumping pressure, has arranged 10 cleaning spray head that only faces the mainstream on the annular chamber, and cleaning spray head's spout is the annular and sprays the form.

The cleaning liquid externally connected with the cleaning pipe 1 is different according to different fans. For the SO2 fan, diluted alkali liquor with the concentration of 1; and (4) adopting strong ammonia water for the focusing and gas filtering fan.

Claims

1. The utility model provides a fan wheel, includes the impeller base member and sets up blade on the impeller base member, its characterized in that: the pressure surface of the blade is provided with at least one flow line groove, and the flow line groove extends inwards from the outer end of the blade.

2. The fan impeller of claim 1, wherein: the number of the flow line grooves arranged on the pressure surface of the blade is 3-5.

3. The fan wheel of claim 2, wherein: the number of the flow line grooves arranged on the pressure surface of the blade is 4.

4. The fan wheel according to any of claims 1-3, wherein: the section of the flow line groove is arc-shaped, U-shaped or zigzag.

5. A fan comprising a fan volute (5), characterised in that a fan wheel according to any of claims 1-4 is connected to the fan volute (5).

6. The fan according to claim 5, characterized in that a front guide vane (3) is provided at the front end of the fan wheel; a cleaning ring is arranged at the front end of the front guide blade (3); the cleaning ring is provided with a liquid inlet pipe (21), an annular pipe (22) and a plurality of liquid outlets, and the liquid outlets of the annular pipe (22) are used for cleaning the spray heads (23).

7. A fan according to claim 5, characterised in that a sewage drain (6) is arranged in the fan volute (5).